I FIXED IT:) Thank you all for your time 
What was happing was the Z catching and stopping then letting go.
What is happing? I have been printing for about 9 months I use the tevo tarantula and haven’t had this problem before what happens is when it gets to 80mm it extrudes lots of plastic then there’s a big blob then none comes out then it starts printing normally. Any idea what is happening?
